Which nursing action has the highest priority when administering a dose of codeine with acetaminophen to a client?

Instruct the client to request assistance when ambulating to the bathroom.

Administer a stool softener/laxative at the same time as the analgesic.

Tell the client to notify the nurse if the pain is not relieved.

Advise the client that the medication should start to work in about 30 minutes.